Members of a group of mostly aquatic, photosynthetic organisms, algae provide much of Earth's oxygen, serve as the food base for almost all aquatic life, and provide foods and industrial products, including petroleum products.
Algae can be used to reduce pollution (greenhouse gases). Scientists and experts have been working to use algae to transform the world's energy needs and slow climate change. (Source: Britannica Online Encyclopedia, USA Today / Photo: Flickr)

What is the Gulf of Mexico dead zone?

Why this Ohio city just granted Lake Erie the same legal rights as humans

What you don't know about seaweed

Mysterious algae vortex the size of Manhattan can be seen from space

Why San Diego's tides are glowing blue

Common seaweed found to produce a beautiful new type of opal

An ancient army of algae may have shaped life on Earth as we know it

Glowing blue algae lights up Tasmanian bay

Grow your own artistic creations with algae-powered ink pens

It's alive! Urban Algae Canopy produces shade, dietary supplements

Danish designers transform seaweed into stylish home furnishings

Stunning emerald green Arabian Sea may herald ecosystem disaster